VLSM less than /24

All the materials I have read on VLSM on concentrate on /24 - /30 for VLSM. What happens when you need 500 hosts? I know you would use a /23, but why does the material only seem to focus on the others. Is it because ICND2 is based on small to medium sized networks?

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theodoxa

I don't know, but I use a /23 at home (172.16.0.0/23)...so that I can use 172.16.0.x for DHCP (Laptops, Tablet, Phone, Wii, TiVo, etc...) and 172.16.1.x for Static Addresses for things such as Servers, Cisco Equipment, and my Media Center PC.

RouteMyPacket

theodoxa wrote: »

I don't know, but I use a /23 at home (172.16.0.0/23)...so that I can use 172.16.0.x for DHCP (Laptops, Tablet, Phone, Wii, TiVo, etc...) and 172.16.1.x for Static Addresses for things such as Servers, Cisco Equipment, and my Media Center PC.

What is your reasoning for using a /23? How do you have it cut up to justify a /23?

ChickenNuggetz

jmasterj206 wrote: »

All the materials I have read on VLSM on concentrate on /24 - /30 for VLSM. What happens when you need 500 hosts? I know you would use a /23, but why does the material only seem to focus on the others. Is it because ICND2 is based on small to medium sized networks?

VLSM is presented in easiest light in the textbooks, so it makes sense to use /24-/30 to do this. Check out the link below if you want more practice:

Use this website: Practice Subnet Skills: Design a VLSM Network

It will randomly generate a VLSM scenario for you. Often the VLSM address schema you'll be figuring out will be for large amounts of hosts. Its good practice!

theodoxa

RouteMyPacket wrote: »

What is your reasoning for using a /23? How do you have it cut up to justify a /23?

It makes static addressing simpler by allowing me to use any number (1 - 254) in the final octet without having to worry about it conflicting with an address assigned [by DHCP] to a Laptop, Desktop, Tablet, Phone, Game Console, or Media Device.